40 MESSES. £. FRANKLAND AND B. F. DIJPPA'S 



which now boiled between 120° and 265° C, It will be most convenient to describe the 

 constituents of this complex liquid under two distinct heads, viz. — 



1st. Products depending upon the duplication of the atom of acetic ether. 



2nd. Products derived from the replacement of hydrogen in the methyl of acetic ether 

 by the alcohol-radicals. 



In order successfully to separate the two products from each other, and especially to 

 disentangle their constituent compounds, it is absolutely necessary to operate upon large 

 quantities of material. But if this be done, there is obtained a considerable quantity of 

 the products of the first division boiling between 204° and 208° C, whilst the products 

 of the second division boil considerably below these temperatures. 



a. Examination of the products depending wpon the duplication of the atom of 



acetic ether. 

 Submitted to analysis, this liquid gave the following numbers : — 

 I. -3920 grm. gave -9010 grm. carbonic acid and -3291 grm. water. 

 II. -2772 grm. gave -6347 grm. carbonic acid and -2338 grm. water. 

 These numbers agree very closely with the formula 



, „ „ . . ^9 Hi6 O3, 



as the lollowmg companson shows : 



In addition to this very close correspondence between the experimental and calcu- 

 lated values, a vapour-density determination gave the number 6-001, the above formula 

 requiring 5-94 ; nevertheless the body in question is not a single substance, for after being 

 boiled for several hours with aqueous potash, its boiling-point rose to between 210° and 

 212°, and on being again submitted to analysis it gave results required by the formula 



CioHjgOa. 



I. -2626 grm. gave -6184 grm. carbonic acid and -2308 grm. water. 

 II. -3339 grm. gave -7896 grm. carbonic acid and -2924 grm. water. 



Calculated. Found. 



186 100-00 



